笛卡尔坐标系，大地坐标系，站心地平坐标系（线型和极坐标形式）之间的转换源代码-Cartesian coordinate system, geodetic coordinates, Station Local coordinate system (linear and polar form) the conversion between the source code

站心极坐标系和站心直角坐标系的转换（用于GPS导航与定位）-Polar coordinate system and the heart stops the heart stops the conversion Cartesian coordinate system (used for GPS navigation and positioning)